First high-resolution analysis of the 4ν₁+ν₃ band of nitrogen dioxide near 1.5 μm

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• 作者：Agnè ; s Perrin ; Samir Kassi ; Alain Campargue
• 关键词：¹⁴N¹⁶O₂ ; Nitrogen dioxide ; High-resolution infrared spectrum ; Electron spin-rotation resonance ; Coriolis resonance ; Anharmonic interaction ; Line position ; Line intensity ; Cavity Ring Down Spectroscopy ; CRDS
• 刊名：Journal of Quantitative Spectroscopy and Radiative Transfer
• 出版年：2010
• 出版时间：October 2010
• 年：2010
• 卷：111
• 期：15
• 页码：2246-2255
• 全文大小：697 K

文摘

The high-resolution absorption spectrum of the 4ν₁+ν₃ band of the ¹⁴N¹⁶O₂ molecule was recorded by CW-Cavity Ring Down Spectroscopy between 6575 and 6700 cm⁻¹. The assignments involve energy levels of the (4,0,1) vibrational state with rotational quantum numbers up to K_a=8 and N=48. A large majority of the spin-rotation energy levels were reproduced within their experimental uncertainty using a theoretical model which takes explicitly into account the Coriolis interactions between the spin-rotational levels of the (4,0,1) vibrational state and those of the (4,2,0) and of (0,9,0) dark states, the anharmonic interactions between the (4,2,0) and (0,9,0) states together with the electron spin-rotation resonances within the (4,0,1), (4,2,0) and (0,9,0) states. Precise vibrational energies, rotational, spin-rotational, and coupling constants were determined for the {(4,2,0), (0,9,0), (4,0,1)} triad of interacting states. Using these parameters and the value of the transition dipole-moment operator determined from a fit of a selection of experimental line intensities, the synthetic spectrum of the 4ν₁+ν₃ band was generated and is provided as Supplementary Material.